iSeries Server 270
118 iSeries Handbook
degree of complexity to the configuration process. A full understanding of configuration rules
associated with the various I/O features of the 270 system is required.
The fundamental bus architecture of the iSeries server is unchanged when using PCI
adapters. The AS/400e IOP continues to off load the main processor; isolate the host from
adapter and network errors; and manage, configure, and service the adapters.
The following functions do not have equivalent function PCI cards for the Model 270:
• ASCII Adapter
• V.25 Autocall cable
• Select standby mode
• X.21 switched WAN dial-up or Shorthold Mode WAN
• Asynchronous communication speeds of less than 300 bps
• Data Rate Select signal on the EIA 232/V.24 interface. This function is used by some
older 2400 bps modems to reduce the speed to 1200 bps.
• LPDA-1 (Link Problem Determination Aids). This is a diagnostic function supported by
some (primarily older IBM) modems.
• V.54 local and remote loopback (diagnostics functions supported by some modems)
Processor Features
• #2431 Model 270 Processor (SStar Uni), includes:
– Eight DIMM memory positions (plug directly onto the processor (direct attach)).
– Embedded Base IOP (CCIN 286C)
– Common Service Processor (CSP) (CCIN 25B9)
• #2432 Model 270 Processor (SStar Uni) includes:
– 2 MB L2 Cache
– Eight DIMM memory positions (plug directly onto the processor (direct attach)).
– Embedded Base IOP (CCIN 286D)
– Common Service Processor (CSP) (CCIN 25B9)
• #2434 Model 270 Processor (SStar 2-Way) includes:
– Sixteen DIMM memory positions with the main storage expansion card (CCIN 2884).
– Base I/O Backplane (CCIN 282F)
– Embedded Base IOP (CCIN 284E)
– Common Service Processor (CSP) (CCIN 282F)
– Internal flex cable for HSL enablement (tower attachment)
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